Improvement in revolving fire-arms



UNITED STATES PATENTy OEEICE.

WILLIAM MASON, or ILIoN, NEW YORK, ASSIGNOE To 'REMINGTON a SONS, 0E SAME PLAGE.

IMPROVEMENT IN REVOLVING FIRE-ARMS.

Specification forming part of Letters Patent No. 51,1 17. .dated November 21, 1865.

To all whom t'tmay' concern,.- y

Be it known that I, WILLIAM MAsO'N, of Ilion, in the county of' Herkimer and State'ot' New York, have invented certain new and useful Improvements in Breech-Loading Fire Arms; and I do hereby declare the-following to be a Vfull, clear, and exact description of the same, reference beinghad to the accompanying drawings, making apartot' this speciflcation, in which- Figure 1 represents a side view, partiallyin section, to show the interior arrangement, otherwise concealed. Iiig. 2 represents an external side view, and showing in red lines the position of the cylinder, pin, and portion of the frame when thrown out laterally to eject the empty cases orto reload the arm.

Similar letters of reference, where-they occur in the separategures, denote like parts of the arm in both of the drawings.

My invent-ion consists, first, in swinging the revolving cylinder, with its base-pin, out of line ot' the center of the barrel a-ndframe, when said cylinder is wholly supported when thus swung out at its fore end.

My invention further consists in the use of a concentric internal groove within and near the fore end of the cylinder, in connection with the concentric external groove and eccentric head on the rear end of the swinging support, said groove `and head being fitted together and held in proper position by the base-pin.

My invention further consists in givingto the base-pin an endwise forward movement less inextent than the entire length of the revolvin g cylinder, said base-pin being governed .in its backward movement by a spring forthe purpose of fastening Aand releasing the cylinder in and out of the ime of the barrel and frame.

My invention further consists in the use of y a bevel .onv theend of a base-pin, with an inclined plane in the frame, for the purpose of allowing thebase-pin to yield, and then spring into its catch when the cylinder and pin are returned to their irin g position.

My invention further consists in the use of a stud upon the barrel and a groove and notch in the base-pin, for releasing and fastening the base-pin as occasion may require. A

My invention further consists in combmin g,

with a non-rotating base-pin, a nut, pin,vand guide, for keeping it always in working yposi.- tion. Y

To' enable others skilled in the art to make and use my invention, I will proceed to describe the saine with reference to the drawings.

.The revolving 'cylinder A is connected to the base-pin so that it may rotate thereon, while the base-pin itself does not rotate; and the base-pin Bis connected with a portion, C, of the frame, which portion C is'hinged to the frame proper, l), at a, so that when the basepin is released from the stud c at its fre end it, as well as the cylinder and frame G, may swing out of the frame, and far enough from the central line of the barrel E to charge the chambers from the rear, ortoeject the empty cartridge-cases therefrom.

The base-pin B has a spring, c, connected with it, and a guide pin or stud, AL', which moves in a slot, m, in the hinged frame-piece C, so that said base-pin may Inove or be moved endwise, but not turn around in its seat. It has, moreover, a notch, n, and a slot, o, for taking a stud, c, on the under side of the barrel to lock it in its place when the cylinder is in its position for having its charges iired.

O11 the cylinder end of the base-pin there, is connected by a sleeve, s, and a nut, t, a cartridge-case ejector, a, of a star shape or form, which, by being pushed rearward by ythe basepin, backs out all the empty cases, and when released the spring e returns it to its recessed position in the rear of the cylinder. The cylinder A slips over thesleeve s, and the two are controlled in their rotation by a pin and slot-- that is to say, the sleeve and the ejector has an'endwise movement independent of thecylinder, but both rotate together. The end of the base-pin, or its nut t, or both, are beveled, as seen more distinctly by the red lines in Fig. 2', so that said'bevel will take against and in an inclined or beveled recess, e, formed in the frame, and move the base-pin B forward against the action of the sprin g e, and when the cylinder arrives in its proper position in the frame the recoil of the Spring shoots the rear end of the base-pin into the recess w andat` th'e same time'locks its frontend by the groove o and stud c.

The cylinder A, while it revolves around the ing. This turning-support is on the hinged or swinging piece C,a.s follows: An internal concentric groove, w, is made within and nearthe fore end ofthe cylinder, and a concentric externel groove, z, on the rearend of the swinging support C, and between the groove z and said rear end of the support there is an eccentric head, 2 overwhich the cylinder first passes beforeitindsits support, and this head'holdsthe 'cylinderon Aits turningsupport on the swinging piece C. Having thus fully described my invention, what I claim therein as new, and desire to secure by LettersPatent, .is--v So combining the base-pin, support, and cylinder as that they may be swung'out of line with the center of the barrel and frame far enough to load the cylinder at the rear und eject the empty-cartridge-cases, substantially as described.4

2. In combination, the internal concentric groove neer the fore end of the cylinder, the externa-l concentric groove and the eccentric head on the swinging support, said grooves and head bein ig fitted and held in proper position by the base-pin, substentiatllyA in the manner and for the purpose set forth.

3. The short endwisemovement ofthe basepin, in combination with the revolving Icylinder and the-spring, for the purpose of fastening `ztnd releasing the cylinder in and-'out of the central line of the barrel and frame, substantially as described. i

4. In combination with the base-pin having an cndwise motion in connection with a spring, the beveled end thereof, and theinclined recess lor plane in the frame `for allowing the `bese-pin to yield While entering the frame, and shooting into its catch when in place, substantially as described. l

,5., rllhe stud on the barrel, in combination with the notch and groove in the base-pin, for forming a. lockingl vand unlocking mechanism for said base-pin, substantially as described' and represented.

6. A non-rotating base-pin, in combination with the rotating ejector and-cylinder, substantially as herein described.

WILLIAM MASON.

Witnesses:

W.l H. THOMAS, ALBERT M. Ross. 

